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Quantitative digestion of fresh herbage by sheep: III. The movement of Mg, Ca, P, K and Na in the digestive tract

Published online by Cambridge University Press:  27 March 2009

N. D. Grace ,
M. J. Ulyatt  and
J. C. Macrae
N. D. Grace
Affiliation:
Applied Biochemistry Division, D.S.I.R., Palmerston North, New Zealand
M. J. Ulyatt
Affiliation:
Applied Biochemistry Division, D.S.I.R., Palmerston North, New Zealand
J. C. Macrae
Affiliation:
Applied Biochemistry Division, D.S.I.R., Palmerston North, New Zealand
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Summary

Sheep prepared either with a rumen cannula, or with a rumen cannula plus re-entrant cannulae in the duodenum and ileum were fed fresh ‘Ruanui’ perennial ryegrass (R), ‘Manawa’ short-rotation ryegrass (M) and white clover (C) at dry-matter intakes ranging from 450 to 1000 g/24 h. Paper impregnated with chromic oxide was given once daily via the rumen fistula as a marker.

Amounts of Mg, Ca, P, K and Na entering and leaving the small intestine and excreted in the faeces were regressed against the intake of each element for each sheep and these equations (all, other than the faecal excretion of Na, significant (P < 0·05)) were used to calculate the extent of apparent absorption or secretion in the stomach, the small intestine and the large intestine at two levels of OM intake (500 and 800 g daily).

Quantities of Mg (at high intake), Ca and K (except sheep fed M) leaving the stomach were significantly lower (P < 0·05), while the amounts of P and Na were significantly higher (P < 0·01) than the amounts consumed. Quantities of Mg (at high intakes) and Ca leaving the small intestine were significantly higher (P < 0·05) while amounts of P, K and Na (at high intakes) were significantly lower (P < 0·05) than the corresponding quantities entering the small intestine. At both intakes in the case of Na and at the higher intakes in the case of the other mineral elements, quantities of Mg, Ca (except sheep fed C), P, K and Na excreted in the faeces were significantly less (P < 0·05) than the amounts entering the large intestine.

Thus at the higher intakes there were net absorptions of Mg, Ca and K (except sheep fed M) from, and net secretions of P and Na into, the stomach. The small intestine was the major site of net absorption for P and K and a minor site for Na, while a net secretion of Mg and Ca occurred into this region. Net absorption of Mg, Ca, P, K and Na occurred from the large intestine at the higher intakes.

The retention of Mg, Ca and P is discussed in relation to the animals' minimal daily requirements of these elements.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 82 , Issue 2 , April 1974 , pp. 321 - 330
Copyright
Copyright © Cambridge University Press 1974

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References

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. London: Agricultural Research Council.Google Scholar
Bruce, J., Goodall, E. D., Kay, R. N. B., Phillipson, A. T. & Vowles, L. E. (1966). The flow of organic and inorganic materials through the alimentary tract of the sheep. Proceedings of the Royal Society B 166, 46–62.Google ScholarPubMed
Butler, G. W., Rae, A. L. & Bailey, R. W. (1968). Influence of pasture species on aspects of animal production. New Zealand Journal of Agricultural Science 3, 8–12.Google Scholar
Care, A. D. & Van't Klooster, A.Th. (1965). In vivo transport of magnesium and other cations across the wall of the gastro-intestinal tract of sheep. Journal of Physiology, London 177, 174–91.CrossRefGoogle ScholarPubMed
Dobson, A. (1959). Active transport through the epithelium of the retioulo-rumen sac. Journal of Physiology, London 146, 235–50.CrossRefGoogle ScholarPubMed
Fiske, C. H. & Subbarow, Y. (1925). The colorimetric determination of phosphorus. Journal of Biological Chemistry 66, 375–400.CrossRefGoogle Scholar
Grace, N. D. (1972). Studies on the movement of magnesium, calcium, phosphorus, sodium and potassium across the gut wall of sheep fed fresh pasture. Proceedings of the New Zealand Society of Animal Production 32, 77–84.Google Scholar
Grace, N. D. & MacRae, J. C. (1972). Influence of feeding regimen and protein supplementation on the sites of net absorption of magnesium in sheep. British Journal of Nutrition 27, 51–5.CrossRefGoogle ScholarPubMed
Joyce, J. P. & Rattray, P. V. (1970). Nutritive value of white clover and perennial ryegrass. III. Intake and utilisation of calcium, phosphorus and magnesium. New Zealand Journal of Agricultural Research 13, 800–7.CrossRefGoogle Scholar
Kay, R. N. B. (1960). The rate of flow and composition of various salivary secretions in sheep and calves. Journal of Physiology, London 150, 515–37.CrossRefGoogle ScholarPubMed
Kay, R. N. B. & Pfeffer, E. (1970). Movements of water and electrolytes into and from the intestine of the sheep. In Physiology of Digestion and Metabolism in the Ruminant (ed. Phillipson, A. T.), pp. 390–402. Newcastle upon Tyne: Oriel Press.Google Scholar
MacRae, J. C. & Armstrong, D. G. (1969). Studies on intestinal digestion in the sheep. I. The use of chromic oxide as an indigestible marker. British Journal of Nutrition 23, 15–23.CrossRefGoogle ScholarPubMed
MacRae, J. C., Ulyatt, M. J., Pearce, P. D. & Hendtlass, J. (1972). Quantitative intestinal digestion of nitrogen in sheep given formaldehyde treated and untreated casein supplements. British Journal of Nutrition 27, 39–50.CrossRefGoogle ScholarPubMed
Oyaert, W. & Bouckaert, J. H. (1961). A study of the passage of fluid through the sheep's omasum. Research in Veterinary Science 2, 41–52.CrossRefGoogle Scholar
Perry, S. C., Cragle, R. G. & Miller, J. K. (1967). Effect of ration upon the intestinal distribution of Ca, Mg, Na, K and N in calves. Journal of Nutrition 93, 283–90.CrossRefGoogle Scholar
Pfeffer, E., Thompson, A. & Armstrong, D. G. (1970). Studies on intestinal digestion in the sheep. III. Net movement of certain inorganic elements in the digestive tract on rations containing different proportions of hay and rolled barley. British Journal of Nutrition 24, 197–204.CrossRefGoogle Scholar
Phillipson, A. T. & Storry, J. E. (1965). The absorption of calcium and magnesium from the rumen and small intestine of the sheep. Journal of Physiology, London 181, 130–50.CrossRefGoogle ScholarPubMed
Price, W. J. (1972). Analytical Atomic Absorption Spectrometry. London: Heydon and Son.Google Scholar
Rogers, P. A. M. & Van't Klooster, A.Th. (1969). Observations on the digestion and absorption of food along the gastro-intestinal tract of fistulatecl cows. 3. The fate of Na, K, Ca, Mg and P in the digesta. Mededelingen Landbouwhogeschool, Wageningen 69, no. 11, 26–39.Google Scholar
Scott, D. (1965). Factors influencing the secretion and absorption of calcium and magnesium in the small intestine of sheep. Quarterly Journal of Experimental Physiology 50, 312–29.CrossRefGoogle Scholar
Scott, D. (1967). Effects of potassium supplements upon the absorption of potassium and sodium from the sheep rumen. Journal of Experimental Physiology 52, 382–91.CrossRefGoogle ScholarPubMed
Stewart, J. & Moodie, E. W. (1956). The absorption of magnesium from the alimentary tract of sheep. Journal of Comparative Pathology and Therapeutics 66, 10–21.CrossRefGoogle ScholarPubMed
Ulyatt, M. J. (1971). Studies on the causes of the differences in pasture quality between perennial ryegrass, short rotation ryegrass and white clover. New Zealand Journal of Agricultural Research 14, 352–67.CrossRefGoogle Scholar
Ulyatt, M. J. & MacRae, J. C. (1974). Quantitative digestion of fresh herbage by sheep. I. The sites of digestion of organic matter, energy, readily fermentable carbohydrate, structural carbohydrate and lipid. Journal of Agricultural Science, Cambridge 82, 295–307.CrossRefGoogle Scholar
Williams, C. H., David, D. J. & Iismaa, O. (1962). The determination of chromic oxide in faeces samples by atomic absorption spectrophotometry. Journal of Agricultural Science, Cambridge 59, 381–85.CrossRefGoogle Scholar
Yang, M. G. & Thomas, J. W. (1965). Absorption and secretion of some organic and inorganic constituents and the distribution of these constituents throughout the alimentary tract of young calves. Journal of Nutrition 87, 444–58.CrossRefGoogle ScholarPubMed